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/* ************************************************************************
* Copyright (C) 2018-2020 Advanced Micro Devices, Inc. All rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* ************************************************************************ */
#include <cstdlib>
#include <iostream>
#include <rocalution/rocalution.hpp>
using namespace rocalution;
int main(int argc, char* argv[])
{
// Initialize rocALUTION
init_rocalution();
// Print rocALUTION info
info_rocalution();
// rocALUTION objects
LocalVector<double> x;
LocalVector<double> rhs;
LocalVector<double> e;
LocalStencil<double> stencil(Laplace2D);
// Set up stencil grid
stencil.SetGrid(100); // 100x100
// Allocate vectors
x.Allocate("x", stencil.GetN());
rhs.Allocate("rhs", stencil.GetM());
e.Allocate("e", stencil.GetN());
// Linear Solver
CG<LocalStencil<double>, LocalVector<double>, double> ls;
// Initialize rhs such that A 1 = rhs
e.Ones();
stencil.Apply(e, &rhs);
// Initial zero guess
x.Zeros();
// Set solver operator
ls.SetOperator(stencil);
// Build solver
ls.Build();
// Print stencil info
stencil.Info();
// Start time measurement
double tick, tack;
tick = rocalution_time();
// Solve A x = rhs
ls.Solve(rhs, &x);
// Stop time measurement
tack = rocalution_time();
std::cout << "Solver execution:" << (tack - tick) / 1e6 << " sec" << std::endl;
// Clear solver
ls.Clear();
// Compute error L2 norm
e.ScaleAdd(-1.0, x);
double error = e.Norm();
std::cout << "||e - x||_2 = " << error << std::endl;
// Stop rocALUTION platform
stop_rocalution();
return 0;
}
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